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SIXTH SEMESTER (CUCBCSS-UG) DEGREE EXAMINATION, MARCH 2022
Microbiology
MBG6B10—GENETICS AND GENETIC ENGINEERING
(2018 Admissions)
Time : Three Hours Maximum : 80 Marks
Draw diagrams wherever necessary.
Section A

Answer all questions.
Each question carries ¥2 mark.

1. The theory of linkage was proposed by :
(8) M. Delbruck. (9) O. Avery.
(c) T.H. Morgan. (d) A. E. Garrod.

2. A situation in which an allele of one gene obliterates the phenotypic expression of all allelic
alternatives of anther gene is called —

3. The ability of a given gene or gene combination to be expressed phenotypicaliy to any degree is
3160 ‏ل‎

4. Name the personality who proposed the duplication theory to explain the mechanism of crossing

over,
5. The number of linkage groups present in human female is
6. Specialized transduction is usually mediated —————— phages.
7. The proteins involved in the chromosome compaction during early prophase is
8. The enzyme used for prokaryotic cell disruption is:
(a) Lysozyme. (b) a-amylase.
(0) Cellulase. (१) -galactosidase.

9. Introduction of foreign DNA into bacteria by bacteriophage is called ——————.

Turn over

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